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Photo: Unsplash.
Seattle from Tokyo
7,699 km, about 10h 18m in the air. Every month scored for the weather at Seattle and for the holidays that crowd it out at both ends.
- JanJSeattle in January: avoid
- FebFSeattle in February: avoid
- MarMSeattle in March: ok
- AprASeattle in April: ok
- MayMSeattle in May: good, busy
- JunJSeattle in June: sweet spot, busy
- JulJSeattle in July: sweet spot, busy
- AugASeattle in August: sweet spot, busy
- SepSSeattle in September: good
- OctOSeattle in October: ok
- NovNSeattle in November: avoid
- DecDSeattle in December: avoid
- Sweet spot
- Good
- OK
- Avoid
- Busy
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Month by month from Tokyo
No fare history on TYO–SEA yet, so this ranking is climate and crowds only. The price column fills in as the scanner collects.
| Month | Max °C | Rain days | Crowds | Verdict | Why |
|---|---|---|---|---|---|
| Jan | 8° | 16d | 80 | avoid | monsoon: 16 rainy days, 188mm |
| Feb | 7° | 13d | 100 | avoid | 7C max, 13 rainy days |
| Mar | 11° | 14d | 100 | ok | 11C max, 14 rainy days |
| Apr | 14° | 12d | 100 | ok | 14C max, 12 rainy days |
| May | 18° | 9d | 62 | goodbusy | busier than usual |
| Jun | 21° | 7d | 65 | sweet spot busy | busier than usual |
| Jul | 25° | 2d | 65 | sweet spot busy | busier than usual |
| Aug | 25° | 4d | 65 | sweet spot busy | busier than usual |
| Sep | 21° | 8d | 75 | good | 21C max, 8 rainy days |
| Oct | 15° | 11d | 80 | ok | 15C max, 11 rainy days |
| Nov | 10° | 16d | 80 | avoid | monsoon: 16 rainy days, 189mm |
| Dec | 8° | 17d | 80 | avoid | monsoon: 17 rainy days, 213mm |
Rain days are the days with at least 2 mm of rain.
Crowds is a score out of 100 where higher is quieter. It counts public-holiday clusters in JP as well as at Seattle, which is why this table differs from the same one read from another country. A busy month is a crowded one, not a bad one — usually it is crowded because the weather is good. Crowds alone never make a month “avoid”: that is reserved for weather worth skipping.
How busy it gets
Getting there
| Nonstop flight | All Nippon Airways, Delta Air Lines |
|---|
Nonstop routes from Wikipedia's airport articles (CC BY-SA 4.0), roads from OpenRouteService, ferries from OpenStreetMap contributors (ODbL). Times are typical, not a schedule, and none of this is a fare — the searches below are where prices live.
Seattle from anywhere · everywhere from Tokyo
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